#include<unistd.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<stdlib.h>


int main(void)
{
	char c;
	int in, out;

	in = open("file.in", O_RDONLY);
	out = open("file.out", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
	
	while (read(in, &c, 1) == 1)
	{
		write(out, &c, 1);
	}

	return 0;
}
